java后端解决跨域三种

1

package com.zys.boot_jeep.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

/**
 * @program:
 * @author:
 * @create: 2020-01-06 10:
 **/
@Configuration
public class CorsAutoConfig {

    @Bean
    public CorsFilter corsFilter(){
        UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource=new UrlBasedCorsConfigurationSource();
        CorsConfiguration corsConfiguration=new CorsConfiguration();
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.addAllowedOrigin("*");
        urlBasedCorsConfigurationSource.registerCorsConfiguration("/**",corsConfiguration);

        CorsFilter corsFilter=new CorsFilter(urlBasedCorsConfigurationSource);
        return corsFilter;
    }
}

 2

@Configuration
public class CorsAutoConfig {

    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("http://12.0.0.1:8083");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig());
        return new CorsFilter(source);
    }
}

3

springmvc的WebMvcConfigurer

    /**
     * 跨域支持
     */
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        // 设置允许跨域的路径
        registry.addMapping("/**")
                // 设置允许跨域请求的域名
                .allowedOrigins("*")
                // 是否允许证书
                .allowCredentials(true)
                // 设置允许的方法
                .allowedMethods("GET", "POST", "DELETE", "PUT")
                // 设置允许的header属性
                .allowedHeaders("*")
                // 跨域允许时间
                .maxAge(3600);
    }